Get the last preroll sample in @appsink. This was the sample that caused the
appsink to preroll in the PAUSED state.
This function is typically used when dealing with a pipeline in the PAUSED
state. Calling this function after doing a seek will give the sample right
after the seek position.
Calling this function will clear the internal reference to the preroll
buffer.
Note that the preroll sample will also be returned as the first sample
when calling gst_app_sink_pull_sample() or the "pull-sample" action signal.
If an EOS event was received before any buffers or the timeout expires,
this function returns %NULL. Use gst_app_sink_is_eos () to check for the EOS
condition.
This function blocks until a preroll sample or EOS is received, the appsink
element is set to the READY/NULL state, or the timeout expires.
Get the last preroll sample in @appsink. This was the sample that caused the appsink to preroll in the PAUSED state.
This function is typically used when dealing with a pipeline in the PAUSED state. Calling this function after doing a seek will give the sample right after the seek position.
Calling this function will clear the internal reference to the preroll buffer.
Note that the preroll sample will also be returned as the first sample when calling gst_app_sink_pull_sample() or the "pull-sample" action signal.
If an EOS event was received before any buffers or the timeout expires, this function returns %NULL. Use gst_app_sink_is_eos () to check for the EOS condition.
This function blocks until a preroll sample or EOS is received, the appsink element is set to the READY/NULL state, or the timeout expires.